Mining machine



E. F. MULLER MINING MACHINE Nov. 14, 1933.

Filed Jan. l0, 1930 5 Sheets-Sheet l yNov. 14, 1933.

. Filed Jan. l0, 1930 l 3 Sheets-Sheet 2 NOV. 14, 1933. l F MULLER 1,934,813

MINING MACHINE Filed Jan. 10, 1930 5 Sheets-Sheet 3 siderable overhang as regards -its supporting base Patented Nov. 14, 1933 Ernst Feeder Mailer, Columbus, Ohio, assigner4 L -to-l The Jeffrey yManufacturing Company,4

Columbus, Ohio, a corporation of vOhio applicati@ Jamey 10.1930.r serial Ne. 419,906 j 2s claims.A ,(ci.- 26a-2s) The present inventionrelates'to that. type ofl mining machine comprising generally a base adapted tobe inoved about the passages vof -a mine and having mounted thereon a horizontallyV 5 projecting cutter barswingablerom' side to side offthe `Ina-chine across its front. Ordinarily, machinesof this type are mounted ontruck Wheels adapted to engage the rails-orr tracksjlaid alongA the mine passages. Powerful motor operatedk de vices are provided onthe base for slowly swinging the cutteribarfrom side to side Vto cut an arcuate kerf in a rnine face in `advance of` the machine or to lmake afsurnping out in a face 'parallel to .the vmine track.y z.

'- The cutter bar osuch a machine has aconsothat the machine as a Wholeis of large overall length when thecutter bar ispositioned. toproject infront of the machineas it- Inust when the machine is to be inov'ed'from one place to another in the mine. The passages through which the machine must travel are often of avvinding natureand frequently to enable themachine vto negotiateasharp turn the-cutter-bar .must be angularly adjusted relative to the supporting base.'

`.With the mechanism ordinarily provided for eiectingl the Working swing oi a cutter bar, considerabletime is Wasted in eectingfthis'mere.

adjusting movement of the bar. According to the present invention, IY provide means for rapidly adfiustingthe bar during the transit or the machine so` that the waste of time ordinarily incident to this operation iseliminated. In as much as very I in case. the cutter bar meets with unexpectedre-r little'pov/eris required to eiect this idle swing-- ing ofthe bar, the swinging instrumentalities, according Yto the invention, .are of relatively light construction. In order to prevent damage to them sistance, I provide means lto relieve-.the driving parts of strain when such condition arises. In addition to these general features, the invention includes'various details of Vstruct'n.1re as Will appear from thefollowing vdescription of an illustrative embodiment of theinventionas l shownfin the accompanying drawingavfherein: Figure 1 is a plan View of a machine embody` ingrthe present invention. Figure 2 is a bottom viewzof a turn-table element-of the machine of-Figure 1. n v- Figure 3 is an enlarged. `vevv of .9J-portion of Figure 2. z Y s f y Figure 4 is a` section on line 4f4of Figure 3.

Figure'. is a view Online 5-54of Figure 3.; vFigure 6 is a section on-line 6--6 Aof Figure 2,

, vertical shaft Figure? isanenlarg'edvievv of control rnechanisrnasv appearinginFigure 1, and

-, Figure is a section on line Referring vnovv to the A84.--8 of Figure drawings, reference numeral 10 Vdenotes a Wheel mounted truck Whose Wheels, not shown..arefadapted-toengage therails ci, the mine track to support themachine. An

electric motor 11 supper ted o'n1the truck through suitable gearing is adapted to drive. cable'reel 12, the truck wheels, and! through screvvV devices arranged in vertical housings 13,14 and 15, 's

adapted to vertically adjust Y orY tilt a `turn-table 16 mounted on a vertical axis.

the forward part of the truck forv anguiaradjustment relative to the latter aboutV J ournalledinra bearing 17 formed in the turn-table, seeparticularly Figureaisa 18 cutter chain I to ,whose upper end is keyed a drivesprocliet 19. Sprocket 19 en.

gagesr'a cutter chain 20l which travels about anl elongated horizontally projecting cutterV bar 21 carried by a cutter bar support 22 ixed to turntabie 16.

To the lower end loffshaft 18v is keyed a master bevel gear y23to the hub of Whichis 4fixed an eccentric V24 lsurroundedby an `eccentric strap 25.

The. eccentric 26 and 27 providediwith strap hasa'pair of integral lugs registering vbores having anl axis lying in aplane at right angles to the axis of shaft `18. vPivotedrto lugs 26 and27 by means 29 to'vvhose other end,

through; a pin -30 at right angles to lthe plane of boit28, is pivoted a spring-pressed Ypawl aboutV the axis o a a ratchet wheel 34 pressed pawl Apavvlcarrier 31 carrying a adapted to'be oscillated Y shaft 33 for cooperation with fixed on shaft 33. A spring- Sii-mounted on theturn-table coop` erates with ratchet wheel`34 to Aprevent reverse rotation of the latter. A shield 36 manipulatable through a A control llever trolling the effective throw drive of eccentric ,24, in

37 is provided for conof pawl'34 under the the-.well known manner.

To thelcwer `end ofpin 3G is secured a block 38 guided in a slot ure Ziengaeingeworm 39 ofra plate 40which is in lfixed 1connection `with turn-table 16.

Cutin-v one end of shaft 33 is avvorrn 41, Fig- Wheel 43 which through is adapted to rotate .a

drum- 44 mounted onai vertical axis on the top orV turn-table 16, Figure Drum 44 has securedto it one end each of cables 45 and v46 Whose other ends are trained in opposite directions about sheaves 47 on the turntable and secured'to fixed lugs 48 and 49 respecbles. Will bewound in an tively.V Upon rotation of drum 4.4, one of the cad the ctherpaidout with the same speed to swing turn-table 16 in the desired direction. The driving power for the cutter bar swinging and operating mechanisms, is derived from a reversible electric motor mounted on turn-table 16 and having an armature pinion 51 engaging master gear 23.

The elements and combination of elements thus far described are known in the art and per se form no part of the present invention.

Mounted adjacent the turn-table periphery and slidable on a line secantial thereto on guides j 52 and 53, is an elongated block 54 housing a compression spring 55. Passed through an aperture 56 in an end wall of block 54 is a pin 57 having a head 58 on which one end of spring 55 is seated. The other end of pin 57 bears against an abutment 59 of the turn-table. In the other end of spring is engaged a pin 60 having a head 6l interposed between the end or" the Vspring and the other end 62 of block 54. Threaded in a bore formed in a wall 63 integral with guide 53 is a cap screw 64 whose inner end passes through an aperture formed in end 62 of block 54 to abut head 61 of pin 60. Ordinarily, block 54 occupies the posi-` tion shown in Figure 4, that iswith its ends equally spaced from abutment 59 and wall 63.

vProjecting downwardly of block 54 and secured thereto by any suitable means, as by welding, is a stud 65 on which is-journaled the boss 66 ofla bell crank lever 67. At one end of the lever on a pin 68 is mounted a double ended pawl 69, while to the other end of the lever is pivoted a'link 70 by means of a pinl 71. The other end of link 70, Figure 2, is pivoted to an integral ear 72 of eccentric strap 25 by means of a pin 73. An internally toothed ring or ring segment 74 is xed to the under, non-rotatable support 74 of turntable 16 in concentric relationy with the turntable axis and in position to be engaged by one end or the other of pawl 69; f

On the lower reduced end 65 of stud 65 is pivoted an arm 75 which is held in place by means of a washer 76 and cap screw 77. A boss 78 is formed -at the distal end of arm 75 and is provided with a bore in which is rotatable a pin 79 having a head 80. Head 80 is provided with Va bore through which is passed a rod 8l pivoted at one of its ends to pawl 69 by means of a pin 82. At its other end, rod 8l has threaded thereon a nut 83 and interposed between this nut and head 80 of pin 79 is a compression spring 84, while interposed between head 80 and pawl 69 is a compressionspring 85. Pivot pin 82 being removed from the pawl mounting pin 68, it will be evident that by a suitable movement of arm 75 pawl 69 may be swung to bring either of its ends into operative engagement Vwith the teeth 'of ring segment '74.-

A bar 86 is pivoted at one end to arm 75 'through pin 79. The opposite end of the bar is guided by a cleat 87 and has pivoted to its extremity a link 88 whose other end is pivoted to a pin 89 xed in a block 90 in eccentric relation to a shaft 91 likewise xed in blockr90. Shaft 91 is surrounded by a sleeve 92 projecting above turn-table 16 and mounted in a boss 93 of the latter. Revoluble on the 'upper end of sleeve'92 is a sheave 47 while intermediate the sheave and turn-table is a spacing washer 94 xed to the turn-table, as by welding, and provided with an axial groove in which is engaged a pin 95 :fixed in sleeve 92 to prevent rotation of the latter.

Mounted on the lower reduced extremity of sleeve 92 is aroller 96 for cooperation with the circular under support Y74. Fixed to the `upper extremity of sleeve 92 is a segmental plate 97 over which is movable a lever 98 fixed to the upper end of shaft. 91. The free end of lever 98 is provided with a boss 99 in which is slidable a pin 100 secured at its upper end to a cap 101. The lower end of pin 100 is Luged in the direction of plate 97 by means of a compression spring 102v bearing against the top of boss 99 and'a stop 103 on pin 100. Plate 97 is provided with an aperture 97 adapted to'be engaged by the lower end of pin 100 and the plate fs also provided with a pair of abutment lugs 104 and 105.

It will be evident that by rocking shaft 91 through movement of lever 98, arm 75 will be rock-ed through link 88 and bar 86, thereby moving pawl 69 to engage either one of its ends with theteeth of ring 74 or to disengage the pawl from the teeth. When pin 100 is engaged in aperture 97 the pawl fs held in the neutral position shown in Figure 3. Swinging movement of lever 98 in either direction from the neutral position is limited by `stop 104 and 105.

Shaft 18 is rotated from the motor at a relatively high speed and through the eccentric strap and link 70 causes rapid oscillation of bell-crank 67 and pawl 69 so that when the latter is engaged with the teeth of ring 74, the turn-table will be swung at a relatively rapid rate about its axis so that the mining mach'ne may be transported without interruption through the mine passages.

Spring 55 is of suflicient force to'resist the normal driving reaction of pawl 69. Should the cutter bar strike the rmine wall or any other obsacle and thus throw a greater strain on the operating parts, spring 55` will yield under the abncrmal reaction of -pawl 69 so that breakage of the parts will be avoided.

It will be understood that the described embodiment of my invention is intended to be merely illustrative and that I do not limit myself except as in the following claims.

I claim:

1. In a machine of theclass described, a base frame movable about a mine, a vertical rotatable shaft on said base frame, means for rotating said shaft, a cutter bar supported on said base frame for swinging movement relative thereto in a horizontal plane, an eccentric on said shaft and rotatable therewith, a par of intermittent grip devices each having its driving element driven from said eccentric, means driven from the driven element of one of said devices for swing'ng the cut.

ter bar at a relatively slow working speed, and means driven from the driven element of the other of said devices for swinging said cutter bar at a relatively rapid adjustngspeed.

2. In a Vmachine of the class described,'a base frame movable about a mine, a cutter bar supported `on said base frame for swinging moveric ment relative thereto about a vertical axis, a ringshaped toothed memberconcentric with said axis and lfixed to said base frame, a pawl mounted in connection with said cutter barand co-operable with the `teeth of said toothed member; means for driving said pawl to swing the cutter bar at a relatively rapid adjusting speed, and

other means for swinging said cutter bar at a relatively slow working speed.

3; In a machine of the class described, a base frame movable about a mine, a cutter bar supported on said base frame for swinging movement relative thereto about a vertical axis, a ring-shaped toothed member concentric with said axis and fixed to said base frame, a pawl mounted in connection with said cutter-bar and cooperable with the teeth of said toothed member; means for driving said pawl to swing 'the-fcutterbar*atA arelatively rapid adjusting speed, and j other Y relative thereto about aVA vertical axis, a ring-1 means drivenfrom the paWl vdriving means for swinging said cutter bar at a relatively slowwork# ingspeed.

4; In 'a machine 'of the' class described, agbase frame movable about a mine,"a` cutter bar supportedon said base frame for swinging movement relative thereto about la vertical axis, a..ring` shapedrtoothed member concentric Awith saidnaxis and iixed to said base frame, a pawl cooperable with' the teeth of said toothed member, a mounting for said pawl in-connection with' said vcutter Abar,vmeans for driving Asaid pawl to swing the cutter bar,Y and means supporting Sthe mounting against normal reaction ofk the pawl but yieldable under abnormalreaction thereof dueto resistance of the cutter bar to swinging movement. 5. In a machine of the'classdescribed, a base frame movable about amine, a'cutterbar's'up` ported on 'said base frame for swinging movement shapedtoothed member concentric'with said axis and fixed to said base frame, apawlcooperable with the teeth ofY saidtoothedfmember, a block on which said pavvl is mounted, a guide for said block in connection with the cutter bar and in which Athe block-"is slidable in the reactional 1 direction'of the pawl, a spring between saidblockv and` anfabutment in nxed .connection with thej cutter bar to oppose normal reaction of said pavvl, and means for driving saidpawl to swing the cutter bar relative to the basegframew.

6'. In a machine of the class described, abas-e elementm'ovable about a mine', a turn-table ele` Vment mounted von said baseelementfor angular.

adjustment `relative to the latter about a vertical axis,`a cutter'bar secured to said turn-table, a

ring-shaped toothed member xedtoone of said,

elements concentric with said axis,ya pavvl mounted on the other of said elements for cooperation with the teeth. of said toothed 'memben meansy for drivingsaid pavvl to rotate `the turn-,table ele-V N ment relative to the` base element, :and means driven by the pawl driving means` to rotate the turntable at aspeedslower. than that :eiected by saidp'awl. '7.In a machine of the class-described, a-base element movableabout a mine, a turn-table vele-`A ment mounted on said base element for angular adjustment'relative to the latter: abouta vertical axis, a cutter bar secured to said turn-table, .a ring-shapedr toothed member xed to one of said elements concentric with said axis, a'pawl coop-v erable with` the teeth of said toothedmember, a mounting `member for said pavvlbn the other of said elements, meansv for driving/saidpawl to,

rotatethe turn-table, and means supporting the mounting member against normal-reaction of the pavvl but yieldable.- .under abnormal'v reactionV thereof. Y. Y Y c 8. In a machine of the class described, a base element movable about a mine, aturn-table elel ment mounted on` said base element for angularV adjustment relative to the latter aboutla vertical axis, a cutter bar secured to said turnv-tableya ring-shaped toothed member xed to; one of said elementsconcentricwith saidaxis, a pawl mounted on the other of said*V elements forlcooperation with the Vteeth of said toothed membeig-'means including a motor von the turnftablejelementjfor driving saidpaWl torotatethe turn-table ele.-

ment relative to-the base element in either ,direce 1 tion, and motor driven, mechanism `operableto n `propel the base element, said pawl driving means being loperableu: independently fof said motor driven mechanism.' f

f 9. In a machine ofrtheclass described, abase Velement movable about a minega turn-table pele-J mentmounted on saidbase element for angular adjustmentirelative to 'thelatter aboutfa vertical axis, arcutter bar secured to vsaid turn-table, a ring-shaped toothed member xed to one ofsaid elements concentric with Said'aXiS, la pawl coop-Y erable with the teethfof said toothed member, va

-mounting member for said` pawl on the other of ed on said framey for angular adjustment relative to thelatter about a vertical' axis;r a cutter bar secured tosaid turn-table, an internally toothed ring iixedtov the frame concentric with said axis, n a double-acting pawl mounted on the turn-table fork selective cooperation with .the teeth offfsaid 100 ring, means forrdriving said `pavvltorotate the turn-table, andmeans driven by thepawl driving means'to rotate the turntablein either direction at a speed slower than that effected by said pawl.

11. Ina machine of the class described, a base 105 irame'mo'vable about' a mine, a turn-tablemountved on said frame for angular adjustment relative `to theY latter about a` vertical axis, acutter barV secured to saidturn-table, .an internally toothed a double-acting ypavvl mounted on tlieturn-table ring, and means includingt a'motor on theturntable for'driving said paWLto rotate the turn table.V 'i' L f 1 112. In a machine oivthelclass described, a base frame movable about a mine,atiirntablemount-A ,ed onsaidframe for yangular..adjus'tn'ient relae tive theretoab'out 'a vertical axis, an internally Y toothedrring' xedY to the frame concentric-with 1 said axis,v a block mounted on said/turnetable for sliding movement on a secantial line adjacent the turn-table periphery, yieldablermeans interposed, between the ends of saidblock-and stops on the turn-table, .a double-acting .pavvi pivoted on said f block, means for selectivelyfengaging said=pawl with the teethof said ring, and means for driving said paWl to rotate .the turn-table, saidyield-l able means being yieldable (only:Y under Yabnormal reactionof-.the pavvl.'4 Y, -f' 13.Y In a rmachine of theclass described, arbase ring iixed to the frame concentric withj said'axis, 110

foi-'selective vcooperation withfthe teeth ef" said frame movableabout al mine, a turn-table mount#v ed Von said'y frame. for?'.jangularl adjustment rela# tive thereto aboutba vertic'alaxis; .1an/,internally toothed ring fixedtc theframe concentricivvith 3 said' axis, :a blockmounted onV said-turn-tableffor l sliding movement on aseeantial line` adjacent the turn-table periphery, vyieldable means.y interposed between the ends'of said blockand stops ontheturn-table, a doubleeacting pavvl pivoted r,on said 1l 3` block, `means for selectively engaging vsaid pavvl withl the teeth of said ring'anduineans includ.-l ing a motor-on the Vturn-tablecfor .driving -said pawi-to rotate the turn-table, said yieldable means n being yieldable only under abnormalfreaction oij thepawl. 4 K Y. Y 14In a machine ofV theclass described-'cutter ,bar` swinging `means Vrincluding aV ball-crank lever, a double-ended pavvlpivoted on said lever,-V an arm pivoted to said lever on an axis parallel i to that of the pawl,.a rod pivoted atl oneend adjacent one end of the pawl and having an abutment at its opposite end, said'arm being provided with means slidably engaging an intermediate portion of'said rod, a spring interposed between the arm and pawl, aispring interposed between the arm and abutment, and means ,fory swinging the arm to adjust the pawl.

15. In a machine-of the class described, the combination with a supporting frame and motor operated means for-propelling said frame, of a cutter-bar mounted thereon for swinging movement relatively thereto, mechanism for feeding said cutter-bar at a relatively slow working speed, and means other than said feeding mechanismfor swinging said cutter-bar at a relatively rapid adjusting speed in either irection without affecting propulsion of the frame by saidr motor operated means.

16. In a machine of the class described, the combination with a supporting frame and motor operated means for propelling said frame, of a cutter-bar mounted thereon for swinging movement relatively thereto, means for feeding said cutter-bar at a relatively slow working speed, mechanism for releasing said feeding means to free said cutter-bar for rapid swinging in either direction, and mechanism other than said feedingmeans for eiecting swinging of said cutterbar at a' relatively rapid adjusting speed in either direction without aifecting propulsionv of the frame bysaid motor operated means.

17. .In a machine of the class described, a base 7 element movable about a mine, a turntable element mounted on said base element for angular adjustment relative to the latter about a vertical axis, `a cutter-bar secured to said turntable', a ring-shaped toothed member fixed to one of said elements vconcentric with said axis, a pawl mounted on the other of said elements for cooperation with the teeth ofV said toothed member, means :for driving said pawl to rotate the turntable element relative to the base element, and means driven by the pawl driving means to rotate the turntable at a speed slower than that effected vby said pawl. v

18. In amachine` of the class described, a base element movable abouta mine, aturntable element mounted on said base element for angular adjustment relative to thelatter about a verti- 'calV axis, .a cutter-harseoured to Ysaid turntable, a ring-shaped toothedmember xed to one of saidl'elements concentric with said axis, a pawl cooperable with the teeth of said toothed member, a mounting member for said pawl onthe other of said elements, means for driving said pawlrto rotate the turntable, and means supporting the mounting member against` normal reaction of the' pawl butl yieldable under abnormal Areaction thereof. l 19; In a machine vof the classV described, a base element movable about a mine, a turntable element mounted on said base element for angular adjustmentl relative to the latter about a vertical axis, a cutter-bar secured to said turntable,

a ring-'shaped toothed member fixed to one of said elements concentric with said axis,.a pawl cooperable with the teeth of said toothed member, a mounting member for said pawl on the other of said elements, means including a motor on'the turntable element for driving said pawl to rotate the turntable, and means supporting the mounting member against normal reaction of thepawlbut yieldable under abnormal reaction thereof.

oscillatable device, means for mounting 20. In a machineof the class described, the combination with a portable base frame, of a turntable mounted thereon for angular adjustment relatively thereto yabout a vertical axis, a cutter-bar mounted on said turntable to move bodily therewith, an internally toothed ring xed to the base frame concentric with said vertical axis, a double acting pawlmounted on a vertical axis Von the turntable for selective cooperation` with the teeth of Ysaid ring, and means for driving said pawl to rotate the turntable in one direction when the pawl is in one position andjin the opposite direction when the pawl is in another position. f

21. In a machine ,of the class described, the combination with a portable supporting frame, of aturntable mounted thereon, a cutter-bar secured to said turntable to swing bodily therewith, means for operating said cutter-bar including the feedthereof by slow swinging of :said cutter-bar, an arcuate rack concentric with the `axis of Yswinging movement of said turntable, vmeans comprising a doubleacting pawl associated with said rack for effecting rapid swinging movement of said turntable and said cutter-bar in either direction, manually operated mechanism for setting said pawl to effect swinging of the cutter-bar in either direction, and motor driven mechanism operable kto propel vsaid supporting frame, said pawl being operable independentlyof said motor driven propulsion mechanism.

22. In a machine of the class described, the combination with a base frame movable about in a mine, of a kerf-cutter supported on said base frame` re'lativelyrthereto on an upright axis, an arcuate toothed member concentric with said upright axis and ixed to said base frame, means comprising a pawl associated with said'arcuate toothed member for swinging the kerf-cutter at a relatively rapid adjusting speed, other means forfeeding said kerf-cutter at a relatively slow working'speed, and mechanism common to the fast swinging means' and the slow swinging means forY driving either one or the other. f

23.V In `a machine of the class described, the combination with a supportingframe, of a cutter-bar mounted thereon for swinging movement relatively thereto, and mechanism comprising a yieldable fulcrum for swingingl said cutter-bar. i

24. In a machine of the class described, the combination with a supporting frame, of a cutter-bar mounted thereon for swinging movement relatively thereto, a stationary arcuate rack, a pawl associated withsaid rack, means comprising a fulcrumed oscillatable member for reciprocating said rpawl to secure swinging movement of said cutter-bar and shock absorbing means associated with lsaid fulcrum to permit the latter to yield when said cutter-bar meets' an obstruction.

25. In a machine of the class described, the combination with a supporting frame, of a cutterbar mounted thereon for swinging movement relatively thereto, an arcuate rack concentric with the axis of swinging movement of said cutter-bar, means comprising a pawl associated with said rack and a pivoted oscillatable device connected to said pawl for effecting swinging of said cutter-bar, a support'for the pivot of said said support for sliding movement on a secantial line relative to said arcuate rack, and yieldable means interposed between said support and saidV mounting means to relieve abnormal reaction on said pawl.' c

26; VIna machine of the class described, the combination with a supporting frame, of a cutterbar mounted thereon for-swinging movement relatively thereto, an arcuate rack mounted in stationary position on said supporting frame concentric With the axis of `swingingmovement of said cutter-bar, means comprising a double acting paWl associated with said rack'and a pivoted oscillatable device connected to said pawl, and shock absorbing means associated with the pivot of said oscillatable device and mounted on a secantial line relative to said arcuate rack.

.27. Ina machine of the class described, the combination with a supporting frame, a turntable von said frame and aVcutter-bar mounted Von the turntable for swingingmoveme'nt there- With, of a stationary arcuate rack on said frame;y

a double acting pawl associated With said rack, means comprising a bell crank lever for'operating said double acting pawl to effect 'swinging of the cutter-bar in either one direction'or the :sok Y l Y 5 other, and Ymanually operated l mechanism 'operable from the top of the turntable for positioning the pawl in connection with said rackto effect Y such swinging yof the cutter-bar in either one direction or the other. l

28. In agmachine ofthe class described, a

movable supporting frameq a cutter bar carried by said supporting frame and swingable horipulsion mechanism for said frame, and motor vzontally relative to the frame, motor driven pro- "driven means comprising a gearing train for swinging said cutter bar at a relatively slow working speed and a gearing train alternatively operable for swinging said cutter bar in either direc- Y tionat a relatively fast adjusting speed, the operation of said swinging means at adjusting speedr being independent of theloperation of said pro-` pulsion mechanism so that rapid adjustment of the cutter bar is possible during propulsion of the machine along amine passage. Y

ERNST FEODOR MULLER. 

